Relationship between microstructures and mechanical properties of Ti-4.5%Al-2%Mo-1.6%V-0.5%Fe-0.3%Si-0.03%C for next-generation aircraft applications

Toshikazu Akahori; Mitsuo Niinomi; Masaaki Nakai; Harumi Tsutsumi; Shiro Aki; Yoshio Itsumi; Shogo Murakami; Hideto Oyama

doi:10.2464/jilm.61.711

Relationship between microstructures and mechanical properties of Ti-4.5%Al-2%Mo-1.6%V-0.5%Fe-0.3%Si-0.03%C for next-generation aircraft applications

Toshikazu Akahori, Mitsuo Niinomi, Masaaki Nakai, Harumi Tsutsumi, Shiro Aki, Yoshio Itsumi, Shogo Murakami, Hideto Oyama

Materials Development Division

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The effects of microstructures on the mechanical properties of Ti-4.5Al-2Mo-1.6V-0.5Fe-0.3Si-0.03C(KS Ti-9)were systematically investigated by conducting several heat treatments for next-generation aircraft applications. The mechanical strength of as-received KS Ti-9 exhibits high anisotropy that is derived from the intense texture(T-texture)of the primary α phase. Such high anisotropy is observed in KS Ti-9 annealed at temperatures slightly below β -transus, but it is drastically decreased in KS Ti-9 subjected to an anisotropy controlling treatment. The reduction in the anisotropy for KS Ti-9 is related to the differences in the orientations of the precipitated acicular α phase.

Original language	English
Pages (from-to)	711-717
Number of pages	7
Journal	Keikinzoku/Journal of Japan Institute of Light Metals
Volume	61
Issue number	12
DOIs	https://doi.org/10.2464/jilm.61.711
Publication status	Published - 2011

Keywords

Anisotropy
Tensile properties
Texture
Type titanium alloy
α+β

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.2464/jilm.61.711

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Relationship between microstructures and mechanical properties of Ti-4.5%Al-2%Mo-1.6%V-0.5%Fe-0.3%Si-0.03%C for next-generation aircraft applications. / Akahori, Toshikazu; Niinomi, Mitsuo; Nakai, Masaaki; Tsutsumi, Harumi; Aki, Shiro; Itsumi, Yoshio; Murakami, Shogo; Oyama, Hideto.

In: Keikinzoku/Journal of Japan Institute of Light Metals, Vol. 61, No. 12, 2011, p. 711-717.

Research output: Contribution to journal › Article › peer-review

Akahori, Toshikazu ; Niinomi, Mitsuo ; Nakai, Masaaki ; Tsutsumi, Harumi ; Aki, Shiro ; Itsumi, Yoshio ; Murakami, Shogo ; Oyama, Hideto. / Relationship between microstructures and mechanical properties of Ti-4.5%Al-2%Mo-1.6%V-0.5%Fe-0.3%Si-0.03%C for next-generation aircraft applications. In: Keikinzoku/Journal of Japan Institute of Light Metals. 2011 ; Vol. 61, No. 12. pp. 711-717.

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abstract = "The effects of microstructures on the mechanical properties of Ti-4.5Al-2Mo-1.6V-0.5Fe-0.3Si-0.03C(KS Ti-9)were systematically investigated by conducting several heat treatments for next-generation aircraft applications. The mechanical strength of as-received KS Ti-9 exhibits high anisotropy that is derived from the intense texture(T-texture)of the primary α phase. Such high anisotropy is observed in KS Ti-9 annealed at temperatures slightly below β -transus, but it is drastically decreased in KS Ti-9 subjected to an anisotropy controlling treatment. The reduction in the anisotropy for KS Ti-9 is related to the differences in the orientations of the precipitated acicular α phase.",

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